/*
 * file newtork.h
 *
 * Hth's TCP Hijacker
 *
 * Hth networks
 * Copyright 2009
 * htt://www.unix-junkies.org
 * mail me at : hth at unix-junkies dot org
 *
 *
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the University of California, Berkeley nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef NETWORK_H
#define NETWORK_H

/*
 * === I N C L U D E S ===
 */
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
#include <assert.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/ip.h>
#include <linux/icmp.h>

#include <pcap.h>

/*
 * === C O N S T A N T S ===
 */
#define ETHERNET_HEADER_LENGTH  14

/*
 * === I N T E R N A L  T Y P E S ===
 */
typedef struct {
    struct timeval capturedAt;
    char * bytes;
    uint32_t len;
} reply_t;


/*
 * === F U N C T I O N S  P R O T O T Y P E S ===
 */
pcap_t * network_pcap_open(char * err);
int network_raw_sock_open(char * err);
int receive_reply(pcap_t * pd, reply_t * reply, uint32_t msecs);
int get_ip_id(reply_t * reply);
void set_pcap_filter(pcap_t * pd, char * filter);
int network_send_icmp_echo(int fd, struct in_addr dst);
uint16_t do_checksum(uint8_t * pck, size_t len);



#endif /* NETWORK_H */

